摘要:
A method for treating a bare copper wire and a surface-treated copper wire includes applying a solution including a phosphoric acid-based chelating agent to a surface of a bare copper wire, and drying the copper wire having the solution including the phosphoric acid-based chelating agent attached on the surface thereof.
摘要:
A method of making a package substrate having a copper bond pad and a location for receiving a semiconductor die having a remnant of one of a group consisting of HEDP and an HEDP derivative on a top surface of the copper bond pad. The semiconductor die is attached to the substrate. A wirebond connection is attached between the remnant and the semiconductor die.
摘要:
A method is provided for treating a leadframe comprising copper or copper alloy to enhance adhesion of molding compound to it. The leadframe is oxidized in an oxidation treatment bath to form copper oxide on the surface of the leadframe. It is then dipped in a complexing or chelating agent to enhance the purity of the copper oxide formed. Thereafter, the leadframe is cleaned with an acid to remove any contaminants remaining on the leadframe.
摘要:
A composition and method for inhibiting corrosion is disclosed. Metals and metal alloys are treated with compositions which contain inorganic and organic acids that prevent oxide formation on the metals and metal alloys.
摘要:
A method is provided for treating a leadframe comprising copper or copper alloy to enhance adhesion of molding compound to it. The leadframe is oxidized in an oxidation treatment bath to form copper oxide on the surface of the leadframe. It is then dipped in a complexing or chelating agent to enhance the purity of the copper oxide formed. Thereafter, the leadframe is cleaned with an acid to remove any contaminants remaining on the leadframe.
摘要:
A method and apparatus for making pad structures suitable for wirebonding and, optionally, also for solder-ball connections. Some embodiments include an electronics chip having a substrate with circuitry, a compliant electrically insulating layer deposited on at least a portion of the substrate, and an electrical connection pad, the pad having an electrical connection to the circuitry through an aperture in the insulating layer and a peripheral bonding zone region extending over the insulating layer. In some embodiments, the bonding zone is exclusively over the insulating layer outside of the aperture. In some embodiments, the pads are suitable for both solder-ball and wirebond connections. By making a wirebond connection to an area of a pad over the compliant insulating layer, the underlying circuitry is protected from ultrasonic energy of the bonding process.
摘要:
A direct chip attachment process and apparatus for aluminum wirebonding on copper circuitization are provided. After at least one integrated circuit chip is attached to a carrier, an aqueous cleaning solution containing citric and oxalic acid based additives is applied to the carrier and attached integrated circuit chip. Then a deionized water rinse is applied to the carrier and attached integrated circuit chip, followed drying for a set time period. Next wirebonding on copper circuitization carried by the carrier is performed.
摘要:
A semiconductor device (2) has a semiconductor chip (16) the front side (1) of which has integrated circuit elements and an electrically conductive metallization structure (3) with chip contact areas (9). The metallization structure (3) has an electrically conductive patterned adhesion layer (6), which provides a low-resistance contact with silicon, and an electrically conductive patterned intermediate layer (7), which provides a connectable surface. Furthermore, a passivation layer (8) is provided, which covers the top side and the edge sides of the intermediate layer (7) whilst leaving the chip contact area (9) free. The intermediate layer (7) comprises Ni and is free of noble metals. The intermediate layer (7) is at least 10 times thicker than the adhesion layer (6).
摘要:
A method and apparatus for making pad structures suitable for wirebonding and, optionally, also for solder-ball connections. Some embodiments include an electronics chip having a substrate with circuitry, a compliant electrically insulating layer deposited on at least a portion of the substrate, and an electrical connection pad, the pad having an electrical connection to the circuitry through an aperture in the insulating layer and a peripheral bonding zone region extending over the insulating layer. In some embodiments, the bonding zone is exclusively over the insulating layer outside of the aperture. In some embodiments, the pads are suitable for both solder-ball and wirebond connections. By making a wirebond connection to an area of a pad over the compliant insulating layer, the underlying circuitry is protected from ultrasonic energy of the bonding process.
摘要:
A semiconductor device comprises: a semiconductor chip; a base metal lead frame with no residual of a rustproof film, including a die pad mounted with said semiconductor chip, and a plurality of leads disposed so that inner ends of said leads are positioned along the periphery of said die pad; copper wires to directly connect electrodes on said semiconductor chip to the inner ends of said plurality of leads; and a resin molded member to hermetically seal said semiconductor chip, a large proportion of said lead frame and said copper wires. A method of manufacturing a semiconductor device comprises: preparing a base metal lead frame including a die pad and a plurality of leads disposed so that inner ends of said leads are positioned along the periphery of said die pad; applying a non-benzotriazole series rustproof agent on the surface of said lead frame; performing die-bonding for fixing a semiconductor chip onto said die pad in a heated atmosphere by use of a non-metal series paste; performing wire-bonding to connect said electrodes on said semiconductor chip to the inner ends of said leads of said lead frame by use of copper wires; forming resin molded member by sealing said lead frame with a resin excluding some portions of said leads; and forming leads protruding from said resin molded member.